Intelligent slurry pipe abrasion monitoring system for slurry balance shield

Abstract

An intelligent slurry pipe abrasion monitoring system for a slurry balance shield can monitor the state of a slurry pipe in a shield construction process, and therefore abrasion of a pipe wall can bereduced. A pH monitoring device, a pH value blending device, a flow velocity control device, a flow monitoring device and a wall thickness monitoring device are all in signal connection with a data acquisition and processing system; the following actions are executed: when slurry enters the slurry pipe, the pH value of the slurry is measured by the pH monitoring device; if the data acquisition andprocessing system judges that the pH value is not in a reasonable range, the pH neutralizing device is instructed to perform blending; the flow monitoring device is arranged on the downstream side ofthe flow velocity control device and monitors the flow of the slurry pipe and reversely deduces the flow velocity of slurry in the slurry pipe; the data acquisition and processing system judges the change of the flow velocity and instructs the flow velocity control device to adjust the flow velocity of the slurry. The wall thickness monitoring device is used for monitoring the wall thickness of the slurry pipe at a measuring point in real time, and monitored data is transmitted to the data acquisition and processing system, so that risk assessment can be conducted.

Description

technical field [0001] The invention relates to a monitoring system for a mud-water balance shield, in particular to an intelligent monitoring system for mud pipe wear suitable for a mud-water balance shield. Background technique [0002] Shield method tunnel construction has the advantages of little impact on the surrounding environment, fast construction speed, and not affected by the depth of covering soil, etc., and is widely used in urban construction. The mud-water balance shield stabilizes the excavation surface by pressurizing muddy water or mud. It is suitable for strata with high moisture content, soft silty clay layer, loose sandy soil layer, gravel layer, pebble layer and hard soil. It is especially suitable for cross-river tunnels and subsea tunnels with high stratum water content and water bodies above. The mud circulation system is an important part of the mud-water balance shield construction. It is directly related to the stability of the excavation surface...

AI Technical Summary

Problems solved by technology

Studies have shown that the wear of the mud pipe wall is related to many factors (such as mud conveying speed, angle of attack, abrasive particle size, gradation, concentration, and pH value, etc.), but due to the lack of monitoring systems and evaluation indicators for the status of mud pipes, it is impossible to Real-time perception and evaluation of the state of the mud pipe

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